*{margin:0;padding:0;box-sizing:border-box}
:root{
  --brand:#1f5eff;
  --brand-2:#00c2a8;
  --brand-3:#ff7a3d;
  --ink:#12203a;
  --ink-2:#43516b;
  --ink-3:#6b7891;
  --line:#e3e9f3;
  --bg:#f4f7fc;
  --bg-2:#eef3fb;
  --card:#ffffff;
  --radius:18px;
  --shadow:0 10px 30px rgba(24,52,110,.08);
  --shadow-lg:0 20px 50px rgba(24,52,110,.14);
}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:
    radial-gradient(1100px 600px at 12% -8%, #dfe9ff 0%, rgba(223,233,255,0) 62%),
    radial-gradient(900px 520px at 92% 4%, #d8fbf3 0%, rgba(216,251,243,0) 60%),
    linear-gradient(180deg,#f7faff 0%, var(--bg) 32%, var(--bg-2) 100%);
  color:var(--ink);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section-head{max-width:760px;margin:0 auto 40px;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--brand);background:#e9f0ff;border:1px solid #d3e0ff;padding:6px 14px;border-radius:999px}
h1,h2,h3,h4{line-height:1.35;letter-spacing:-.01em}
h2{font-size:clamp(23px,3vw,34px);color:var(--ink)}
h3{font-size:18px;color:var(--ink)}
.section-head p{margin-top:14px;color:var(--ink-2);font-size:15.5px}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* 导航 */
.site-header{position:sticky;top:0;z-index:80;background:rgba(247,250,255,.86);backdrop-filter:blur(14px);border-bottom:1px solid rgba(227,233,243,.9)}
.nav-bar{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:72px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.ai-page-logo{width:132px;height:auto}
.brand-text{display:flex;flex-direction:column;line-height:1.25}
.brand-text strong{font-size:16px;color:var(--ink)}
.brand-text span{font-size:11.5px;color:var(--ink-3);letter-spacing:.04em}
.nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap}
.nav-links a{display:block;padding:8px 12px;font-size:14px;color:var(--ink-2);border-radius:9px;transition:color .22s,background .22s;white-space:nowrap}
.nav-links a:hover{color:var(--brand);background:#e9f0ff}
.nav-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:14.5px;font-weight:600;padding:11px 22px;border-radius:12px;border:1px solid transparent;cursor:pointer;transition:transform .2s,box-shadow .24s,background .24s,color .24s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,#1f5eff,#0b8bff);color:#fff;box-shadow:0 10px 22px rgba(31,94,255,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(31,94,255,.34)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);box-shadow:0 4px 14px rgba(24,52,110,.06)}
.btn-ghost:hover{color:var(--brand);border-color:#c3d5ff;transform:translateY(-2px)}
.btn-lg{padding:14px 30px;font-size:16px;border-radius:14px}
.nav-toggle{display:none;width:44px;height:44px;border-radius:12px;background:#fff;border:1px solid var(--line);align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:.25s}

/* Hero */
.hero{position:relative;overflow:hidden;padding:70px 0 78px}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(10px);pointer-events:none}
.hero::before{width:520px;height:520px;right:-160px;top:-160px;background:radial-gradient(circle,#c9dcff 0%,rgba(201,220,255,0) 70%)}
.hero::after{width:420px;height:420px;left:-140px;bottom:-180px;background:radial-gradient(circle,#bff4e9 0%,rgba(191,244,233,0) 70%)}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:44px;align-items:center}
.hero-copy h1{font-size:clamp(29px,4.2vw,46px);font-weight:800;letter-spacing:-.02em;margin-top:18px}
.hero-copy h1 em{font-style:normal;background:linear-gradient(120deg,#1f5eff,#00b39a);-webkit-background-clip:text;background-clip:text;color:#1449c9}
.hero-copy p.lead{margin-top:18px;font-size:16px;color:var(--ink-2);max-width:560px}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:26px}
.hero-tags span{font-size:12.5px;color:var(--ink-2);background:#fff;border:1px solid var(--line);padding:6px 12px;border-radius:999px;box-shadow:0 3px 10px rgba(24,52,110,.04)}
.hero-panel{position:relative;background:rgba(255,255,255,.86);border:1px solid #dfe8f7;border-radius:26px;padding:26px;box-shadow:var(--shadow-lg);backdrop-filter:blur(8px);animation:floatIn .9s cubic-bezier(.2,.7,.3,1) both}
.hero-panel h2{font-size:16px;color:var(--ink-2);font-weight:600;letter-spacing:.02em}
.hero-metrics{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:18px}
.metric{background:linear-gradient(160deg,#f5f9ff,#eaf1ff);border:1px solid #e0e9fa;border-radius:14px;padding:16px}
.metric strong{display:block;font-size:24px;font-weight:800;color:#1449c9;letter-spacing:-.02em}
.metric span{font-size:12.5px;color:var(--ink-3)}
.hero-models{margin-top:20px;padding-top:18px;border-top:1px dashed #dbe5f5}
.hero-models p{font-size:12.5px;color:var(--ink-3);margin-bottom:10px}
.model-chips{display:flex;flex-wrap:wrap;gap:7px}
.model-chips i{font-style:normal;font-size:12px;color:#1f4fd0;background:#fff;border:1px solid #d9e5fb;padding:4px 10px;border-radius:8px;transition:.2s}
.model-chips i:hover{background:#1f5eff;color:#fff;border-color:#1f5eff;transform:translateY(-2px)}
@keyframes floatIn{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}

/* 关于 */
.about-wrap{display:grid;grid-template-columns:1fr 1fr;gap:38px;align-items:start}
.about-text p{color:var(--ink-2);font-size:15.5px;margin-bottom:14px}
.about-list{display:grid;gap:12px;margin-top:22px}
.about-list li{display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px;box-shadow:0 4px 16px rgba(24,52,110,.05);transition:transform .25s,box-shadow .25s}
.about-list li:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.about-list b{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;flex-shrink:0;border-radius:8px;background:#e9f0ff;color:#1f4fd0;font-size:13px}
.about-list span{font-size:14.5px;color:var(--ink-2)}
.about-card{background:linear-gradient(165deg,#10245a,#1b3b8f 55%,#155fa8);border-radius:24px;padding:32px;color:#eaf1ff;box-shadow:var(--shadow-lg)}
.about-card h3{color:#fff;font-size:20px}
.about-card p{color:#c3d6ff;font-size:14.5px;margin-top:12px}
.about-card .divider{height:1px;background:rgba(255,255,255,.18);margin:22px 0}
.about-card ul{display:grid;gap:10px}
.about-card li{font-size:14px;color:#dbe7ff;display:flex;gap:9px;align-items:flex-start}
.about-card li::before{content:"";width:7px;height:7px;flex-shrink:0;margin-top:8px;border-radius:50%;background:#5cffd6}

/* 服务卡片 */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.svc-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:0 6px 20px rgba(24,52,110,.06);transition:transform .28s,box-shadow .28s,border-color .28s;overflow:hidden}
.svc-card::after{content:"";position:absolute;inset:auto -40px -60px auto;width:120px;height:120px;border-radius:50%;background:radial-gradient(circle,#e9f1ff,rgba(233,241,255,0));transition:transform .5s}
.svc-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:#c9dbff}
.svc-card:hover::after{transform:scale(1.6)}
.svc-icon{width:46px;height:46px;border-radius:13px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#e7efff,#d5f6ef);color:#1f4fd0;font-weight:800;font-size:15px;margin-bottom:16px}
.svc-card h3{margin-bottom:9px}
.svc-card p{font-size:14px;color:var(--ink-2)}
.svc-card .tag{display:inline-block;margin-top:14px;font-size:12px;color:#0a7f6b;background:#e3fbf5;border-radius:8px;padding:4px 10px}

/* 一站式制作 */
.flow-wrap{background:#fff;border:1px solid var(--line);border-radius:26px;padding:34px;box-shadow:var(--shadow)}
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.flow-step{position:relative;background:linear-gradient(170deg,#f6f9ff,#eef4ff);border:1px solid #e1eaf9;border-radius:16px;padding:20px 18px;transition:transform .25s,box-shadow .25s}
.flow-step:hover{transform:translateY(-4px);box-shadow:0 14px 28px rgba(24,52,110,.1)}
.flow-step b{display:block;font-size:12px;letter-spacing:.1em;color:#1f5eff;margin-bottom:8px}
.flow-step strong{display:block;font-size:15.5px;color:var(--ink);margin-bottom:6px}
.flow-step span{font-size:13px;color:var(--ink-3)}
.scene-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.scene-tags span{font-size:13px;color:var(--ink-2);background:#f4f8ff;border:1px solid #e2ebfa;border-radius:10px;padding:8px 13px;transition:.22s}
.scene-tags span:hover{background:#fff;border-color:#bcd2ff;color:#1f4fd0;transform:translateY(-2px);box-shadow:0 8px 18px rgba(24,52,110,.08)}

/* 行业方案 */
.solution-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.sol-card{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;border-top:3px solid #1f5eff;transition:transform .25s,box-shadow .25s}
.sol-card:nth-child(2){border-top-color:#00b39a}
.sol-card:nth-child(3){border-top-color:#ff7a3d}
.sol-card:nth-child(4){border-top-color:#7b61ff}
.sol-card:nth-child(5){border-top-color:#0b8bff}
.sol-card:nth-child(6){border-top-color:#e0538a}
.sol-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.sol-card h3{font-size:16.5px;margin-bottom:8px}
.sol-card p{font-size:14px;color:var(--ink-2)}

/* 服务网络 */
.network{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.net-item{background:linear-gradient(160deg,#ffffff,#f2f7ff);border:1px solid var(--line);border-radius:16px;padding:22px;text-align:center;transition:transform .25s,box-shadow .25s}
.net-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.net-item strong{display:block;font-size:16px;color:var(--ink);margin-bottom:6px}
.net-item span{font-size:13px;color:var(--ink-3)}

/* 时间线 */
.timeline{position:relative;display:grid;gap:22px;padding-left:26px;border-left:2px dashed #c8d8f6}
.tl-item{position:relative;background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px 22px;box-shadow:0 4px 16px rgba(24,52,110,.05);transition:transform .25s,box-shadow .25s}
.tl-item:hover{transform:translateX(4px);box-shadow:var(--shadow)}
.tl-item::before{content:"";position:absolute;left:-33px;top:24px;width:12px;height:12px;border-radius:50%;background:#1f5eff;border:3px solid #dbe7ff}
.tl-item b{font-size:12px;color:#1f5eff;letter-spacing:.08em}
.tl-item h3{font-size:16px;margin:6px 0 6px}
.tl-item p{font-size:14px;color:var(--ink-2)}

/* 案例 */
.case-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:22px;align-items:start}
.case-media{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.case-media:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.case-media figure{margin:0}
.case-media .thumb{width:100%;aspect-ratio:16/9;overflow:hidden;background:#eef3fb}
.case-media .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.case-media:hover .thumb img{transform:scale(1.04)}
.case-media figcaption{padding:18px 20px}
.case-media figcaption strong{display:block;font-size:15.5px;color:var(--ink)}
.case-media figcaption span{font-size:13px;color:var(--ink-3)}
.case-side{display:grid;gap:20px}
.case-square{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.case-square:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.case-square .thumb{width:100%;aspect-ratio:1/1;overflow:hidden;background:#eef3fb}
.case-square .thumb img{width:100%;height:100%;object-fit:cover}
.case-square figcaption{padding:16px 18px;font-size:14px;color:var(--ink-2)}
.case-inline{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;margin-top:22px}
.case-inline .case-square .thumb{aspect-ratio:16/10}

/* 对比评测 */
.rating-band{display:grid;grid-template-columns:auto 1fr;gap:28px;align-items:center;background:linear-gradient(135deg,#10245a,#1b3b8f 60%,#0b6bc4);border-radius:24px;padding:32px;color:#fff;box-shadow:var(--shadow-lg)}
.rating-score{text-align:center;padding-right:28px;border-right:1px solid rgba(255,255,255,.22)}
.rating-score strong{display:block;font-size:52px;font-weight:800;letter-spacing:-.03em;line-height:1.05;color:#fff}
.rating-score em{font-style:normal;font-size:13px;color:#bfd4ff;display:block;margin-top:6px}
.stars{color:#ffd45e;letter-spacing:3px;font-size:17px;margin-top:8px}
.rating-text h3{color:#fff;font-size:20px}
.rating-text p{color:#c3d6ff;font-size:14.5px;margin-top:8px}
.table-wrap{overflow-x:auto;margin-top:26px;border:1px solid var(--line);border-radius:16px;background:#fff;box-shadow:var(--shadow)}
table{width:100%;border-collapse:collapse;min-width:720px;font-size:14.5px}
th,td{padding:15px 18px;text-align:left;border-bottom:1px solid #eef2f9}
thead th{background:#f2f7ff;color:#12203a;font-weight:700;font-size:14px}
tbody tr:hover{background:#f8fbff}
tbody tr:last-child td{border-bottom:none}
td.point{font-weight:600;color:var(--ink)}
td.strong{color:#0a7f6b;font-weight:600}

/* 评论 */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:0 6px 18px rgba(24,52,110,.06);transition:transform .25s,box-shadow .25s}
.review:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.review .stars{color:#ffb020;letter-spacing:2px;font-size:14px;margin-bottom:12px}
.review p{font-size:14.5px;color:var(--ink-2)}
.review .who{display:flex;align-items:center;gap:10px;margin-top:18px;padding-top:14px;border-top:1px dashed #e4ebf7}
.avatar{width:38px;height:38px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700;color:#fff;background:linear-gradient(135deg,#1f5eff,#00c2a8);flex-shrink:0}
.who strong{display:block;font-size:13.5px;color:var(--ink)}
.who span{font-size:12px;color:var(--ink-3)}

/* Token 比价 */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.price-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px;box-shadow:0 6px 20px rgba(24,52,110,.06);transition:transform .28s,box-shadow .28s;position:relative}
.price-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.price-card.hot{border-color:#bcd2ff;background:linear-gradient(180deg,#f7faff,#fff)}
.price-card .badge{position:absolute;top:16px;right:16px;font-size:11.5px;color:#fff;background:#ff7a3d;border-radius:8px;padding:3px 10px}
.price-card h3{font-size:17px;margin-bottom:6px}
.price-card .sub{font-size:13px;color:var(--ink-3);min-height:22px}
.price-card .num{margin:16px 0 4px;font-size:32px;font-weight:800;color:#1449c9;letter-spacing:-.02em}
.price-card .num small{font-size:13px;font-weight:600;color:var(--ink-3);margin-left:4px}
.price-card ul{display:grid;gap:9px;margin:16px 0 22px}
.price-card li{font-size:13.5px;color:var(--ink-2);display:flex;gap:8px;align-items:flex-start}
.price-card li::before{content:"";width:6px;height:6px;margin-top:8px;flex-shrink:0;border-radius:50%;background:#1f5eff}
.price-note{margin-top:20px;font-size:13px;color:var(--ink-3);text-align:center}

/* 表单 */
.form-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:32px;align-items:start}
.contact-card{background:linear-gradient(165deg,#10245a,#1b3b8f 60%,#0b6bc4);border-radius:22px;padding:32px;color:#eaf1ff;box-shadow:var(--shadow-lg)}
.contact-card h3{color:#fff;font-size:20px}
.contact-card p{font-size:14px;color:#c3d6ff;margin-top:10px}
.contact-list{display:grid;gap:14px;margin-top:22px}
.contact-list div{font-size:14px;color:#dbe7ff}
.contact-list strong{color:#fff;display:block;font-size:12.5px;letter-spacing:.06em;font-weight:600;margin-bottom:2px;color:#9fc0ff}
.qr-box{margin-top:22px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:14px;padding:14px;text-align:center}
.qr-box img{width:132px;height:132px;object-fit:contain;margin:0 auto;border-radius:8px;background:#fff;padding:6px}
.qr-box span{display:block;font-size:12.5px;color:#c3d6ff;margin-top:8px}
.form-card{background:#fff;border:1px solid var(--line);border-radius:22px;padding:32px;box-shadow:var(--shadow-lg)}
.form-card h3{font-size:19px;margin-bottom:6px}
.form-card .form-desc{font-size:13.5px;color:var(--ink-3);margin-bottom:22px}
.field{margin-bottom:16px}
.field label{display:block;font-size:13.5px;font-weight:600;color:var(--ink-2);margin-bottom:7px}
.field input,.field select,.field textarea{width:100%;font-family:inherit;font-size:14.5px;color:var(--ink);background:#f7faff;border:1px solid #dde6f4;border-radius:11px;padding:12px 14px;transition:border-color .2s,box-shadow .2s,background .2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:#7ba5ff;background:#fff;box-shadow:0 0 0 4px rgba(31,94,255,.12)}
.field textarea{min-height:110px;resize:vertical}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-tip{font-size:12.5px;color:var(--ink-3);margin-top:12px}
.form-card .btn{width:100%;margin-top:6px}

/* FAQ */
.faq-list{display:grid;gap:12px;max-width:900px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 4px 14px rgba(24,52,110,.05);transition:box-shadow .25s,border-color .25s}
.faq-item.open{border-color:#bcd2ff;box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;text-align:left;background:none;border:none;cursor:pointer;padding:18px 22px;font-family:inherit;font-size:15.5px;font-weight:600;color:var(--ink)}
.faq-q .ic{width:24px;height:24px;flex-shrink:0;border-radius:50%;background:#e9f0ff;color:#1f5eff;display:flex;align-items:center;justify-content:center;font-size:16px;transition:transform .3s,background .3s,color .3s}
.faq-item.open .ic{transform:rotate(45deg);background:#1f5eff;color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 22px 20px;font-size:14.5px;color:var(--ink-2)}

/* 文章 & 百科 */
.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.article{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;box-shadow:0 6px 18px rgba(24,52,110,.05);transition:transform .25s,box-shadow .25s,border-color .25s;display:flex;flex-direction:column;gap:10px}
.article:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:#c9dbff}
.article .meta{font-size:12px;color:#1f5eff;letter-spacing:.06em;font-weight:600}
.article h3{font-size:16px}
.article p{font-size:13.8px;color:var(--ink-2)}
.article .more{margin-top:auto;font-size:13.5px;color:#1f4fd0;font-weight:600}
.wiki-cloud{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:26px}
.wiki-cloud a{font-size:13.5px;color:var(--ink-2);background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 16px;transition:.22s;box-shadow:0 3px 10px rgba(24,52,110,.04)}
.wiki-cloud a:hover{color:#1f4fd0;border-color:#bcd2ff;transform:translateY(-2px);box-shadow:0 8px 18px rgba(24,52,110,.09)}

/* 联系/加盟 */
.join-band{background:linear-gradient(135deg,#e8f1ff,#dffbf4);border:1px solid #d3e7ff;border-radius:24px;padding:38px;display:grid;grid-template-columns:1.2fr auto;gap:28px;align-items:center}
.join-band h2{font-size:clamp(21px,2.6vw,28px)}
.join-band p{font-size:14.5px;color:var(--ink-2);margin-top:10px;max-width:620px}
.join-btns{display:flex;flex-wrap:wrap;gap:12px}

/* footer */
.site-footer{background:#0e1f45;color:#c6d6f5;padding:52px 0 0;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;padding-bottom:34px}
.footer-brand img{width:130px;background:#fff;padding:8px 10px;border-radius:10px;margin-bottom:14px}
.footer-brand p{font-size:13.5px;color:#9fb5dd;line-height:1.8}
.footer-col h4{color:#fff;font-size:14.5px;margin-bottom:14px;letter-spacing:.04em}
.footer-col ul{display:grid;gap:9px}
.footer-col a{font-size:13.5px;color:#a9bfe6;transition:color .2s}
.footer-col a:hover{color:#7fd3ff}
.footer-contact li{font-size:13.5px;color:#a9bfe6}
.footer-contact li strong{color:#dbe7ff;font-weight:600}
.friend-links{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;flex-wrap:wrap;gap:10px 18px;align-items:center}
.friend-links span{font-size:13px;color:#8ea8d6;font-weight:600}
.friend-links a{font-size:13px;color:#a9bfe6}
.friend-links a:hover{color:#7fd3ff}
.copyright{border-top:1px solid rgba(255,255,255,.12);padding:16px 0 22px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;font-size:12.5px;color:#8ea8d6}
.copyright a{color:#a9bfe6}
.copyright a:hover{color:#7fd3ff}

/* 浮动 */
.float-tools{position:fixed;right:18px;bottom:22px;z-index:90;display:flex;flex-direction:column;gap:10px;align-items:center}
.ft-btn{width:48px;height:48px;border-radius:14px;background:#fff;border:1px solid var(--line);box-shadow:0 10px 24px rgba(24,52,110,.16);display:flex;align-items:center;justify-content:center;cursor:pointer;color:#1f4fd0;font-size:12px;font-weight:700;transition:transform .2s,background .2s,color .2s}
.ft-btn:hover{transform:translateY(-3px);background:#1f5eff;color:#fff;border-color:#1f5eff}
.ft-btn svg{width:22px;height:22px}
.qr-pop{position:fixed;right:78px;bottom:22px;z-index:91;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(8px);transition:.25s}
.qr-pop.show{opacity:1;visibility:visible;transform:none}
.qr-pop img{width:140px;height:140px;object-fit:contain}
.qr-pop span{display:block;text-align:center;font-size:12px;color:var(--ink-3);margin-top:6px}

@media (max-width:1080px){
  .nav-links{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:10px 20px 18px;box-shadow:0 18px 30px rgba(24,52,110,.12);gap:2px}
  .nav-links.open{display:flex}
  .nav-links a{padding:11px 12px;font-size:14.5px}
  .nav-toggle{display:flex}
  .nav-actions .btn{display:none}
  .hero-grid{grid-template-columns:1fr;gap:32px}
  .about-wrap,.form-wrap,.case-grid{grid-template-columns:1fr}
  .grid-3,.solution-grid,.review-grid,.price-grid,.article-grid{grid-template-columns:repeat(2,1fr)}
  .flow-grid,.network{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .join-band{grid-template-columns:1fr}
  .rating-band{grid-template-columns:1fr;gap:20px}
  .rating-score{border-right:none;border-bottom:1px solid rgba(255,255,255,.22);padding:0 0 18px}
}
@media (max-width:680px){
  .section{padding:52px 0}
  .hero{padding:44px 0 56px}
  .grid-3,.solution-grid,.review-grid,.price-grid,.article-grid,.flow-grid,.network,.case-inline{grid-template-columns:1fr}
  .hero-metrics{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:24px}
  .brand-text span{display:none}
  .ai-page-logo{width:112px}
  .float-tools{right:12px;bottom:14px}
  .qr-pop{right:70px;bottom:14px}
  .copyright{justify-content:flex-start}
  .flow-wrap,.about-card,.form-card,.contact-card,.join-band{padding:24px}
}